The Driver,loudspeaker, cataloged under National Stock Number 5965-00-221-5789, is classified within Federal Supply Class 5965 (Headsets, Handsets, Microphones and Speakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Spencer Industries Inc. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5965-00-221-5789 |
| Primary Part Number | SC-C-90644 |
| Item Name | Driver,loudspeaker |
| FSC / FSG | 5965 / 59 — Headsets, Handsets, Microphones and Speakers |
| Manufacturer | Spencer Industries Inc |
| Status | ACTIVE |
| Voice Coil Impedance Rating | 15.0 OHMS NOMINAL |
| Overall Diameter | 5.000 INCHES NOMINAL IN |
| Peak Input Wattage Rating in Watts | 30.0 |
| Voice Coil | NOT INCLUDED |
| Normal Input Wattage Rating in Watts | 25.0 |
| Mounting Configuration | MOUNTS TO HORN W/ 1-3/8 IN. -24 THREADED NIPPLE IN |
| Nominal Diaphragm Size | 1.000 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| SC-C-90644 | Spencer Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| SC-C-90644 | 3/2 Design control — primary reference U.S. Government activity |
| MIL-L-13941 | 5/9 Secondary reference U.S. Government activity |
| SC-C-90644 | 5/9 Secondary reference U.S. Government activity |
| MX-1054/U | 5/2 Secondary reference U.S. Government activity |
NSN 5965-00-221-5789 is a Driver,loudspeaker, manufactured by Spencer Industries Inc, classified under FSC 5965, Headsets, Handsets, Microphones and Speakers. Status: active.
NSN 5965-00-221-5789 has 1 manufacturer part number on file: SC-C-90644 (Spencer Industries Inc).
Key specifications for SC-C-90644: Voice Coil Impedance Rating: 15.0 OHMS NOMINAL; Overall Diameter: 5.000 INCHES NOMINAL IN; Peak Input Wattage Rating in Watts: 30.0; Voice Coil: NOT INCLUDED. 7 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.